Honda Rebel 2020 Series Owner's Manual page 60

Maintenance Fundamentals
#
Charging
If you use electrical accessories that drain the
battery or you do not ride frequently, we
recommend that you charge the battery every
30 days using a charger designed specifically for
your Honda, which can be purchased from your
dealer. Read the information that came with
your battery charger and follow the instructions
on the battery. Avoid using an automobile-type
battery charger, as these can overheat a
motorcycle battery and cause permanent
damage.
Make sure the ignition switch is in the OFF
position before charging the battery.
NOTICE
Improper charging can damage the battery. If
you can't charge the battery or it appears unable
to hold a charge, contact your dealer.
58
NOTICE
Jump starting using an automobile battery can
damage your vehicle's electrical system and is
not recommended. Bump starting is also not
recommended.
NOTICE
Installing non-Honda electrical accessories can
overload the electrical system, discharging the
battery and possibly damaging the system.